Sheet feeding apparatus



May 6, 1941. A. w. MILLS ET AL SHEET FEEDING APPARATUS Filed .June 25,1959 9 Sheets-Sheet l Illlllll qlllllr 252; WZMJ ATTORNEY 9 Sheets-Sheet2v A. w. MILLS ETAL SHEET FEEDING APPARATUS F11edJune 23, 1939 May 6,1941'.

' ATTORNEY May 6, 1941.

A. w. MILLS EIAL SHEET FEEDING APPARATUS Filed June 23, 1939 9 Sheets$heet3 NN (WWQE. MS

l EN 5 Fa NY TOR B a. d

r ATTORNEY 9 Sheets-Sheet 4 ATTORNEY May 6, 1941. A. w. MiLLS ETAL SHEETFEEDING APPARATUS Filed June 23, 1939' May 6, 1941. A. w. MILLS ETALSHEET FE EDING APPARATUS 9 Sheets-Sheet 5 Filed June 23, 1939 [26 NVENTOR 5 5 BY m ATTORNEY y 1941- A. w. MILLS ETAL 2,240,568 I SHEET FEEDINGAPP ARATUS File'd June 23, 1939 9 Sheets-Sheet 6 S a INXEyTgE ATTORNEYMay 6, 1941. A. w. MILLS ETAL SHEET FEEDING APPARATUS Filed June 23,1939 9 Sheets-Sheet"? ATTORNEY FIG! 3.

A. W. MILLS ETAL SHEET FEEDING APPARATUS May 6, 1941.

Filed June 25, 1959 9 Sheets-Sheet 8 ATTORNEY y 1941- A. w. MILLS ET AL2,240,568

SHEET FEEDING APPARATUS Filed Jnne 25, 1939 9 SheetsSheet 9 264 /262FIG. 15, X I

- 4i I "-265 L] 275 26 7 H o 1661 Rates FRONT 6575 or r410 0044s a3- nPlain/ks Jails 14g ATTORNEY Patented May 6, 1941 FFICE SHEET FEEDINGAPPARATUS Albert 'w. Mills, Endicott, Frank J. Vestal, and Sigurd L.Walsoe, N. Y., assignors to International Fur-man, Binghamton, BusinessMachines Corporation, New York, N. Y., a corporation of New YorkApplication June 23, 1939, Serial No. 280,772 11 Claims. (Cl. 197-130)This case relates to work handling means for a recording apparatus, suchas a typewriter or the like.

The term "sheet may be used hereinafter to denote a letter sheet,envelope, or similar work.

The general object of the invention is to provide novel and improvedmeans automatically to insert a sheet into printing position in therecording unit and to elect a sheet therefrom.

More specifically, an object is to provide, in connection with arecordingapparatus having a laterally movable caniage, means to preventfeeding or ejecting of a recording apparatus unless the carriage is in apredetermined position.

Still more specifically, it is contemplated to provide automatic meansto feed a sheet to and eject a sheet from the platen of the recording apparatus and which is operable only when the platen or carriage of therecording apparatus has first been set in a predetermined lateralposition.

Another object is to provide sheet squaring means within the feedsection of the'machine to square and definitely locate the sheet priorto its insertion into the recording apparatus. v

It is also an object to provide automatic means,

" exiting alternatively to the manual means, for

operating th ordinary feed release mechanism of a typewriter.

vIt is an object, further, to associate with the ordinary feed releaseoperating mechanism, stop.

means for arresting the sheet in a definite location and to square thesheet before it is automatically fed around the platen to writingposition.

Still another object is to provide elements spaced to permit only onesheet at a time to pass therethrough from a supply stack to feedingapparatus and the spacing of which may be varied in accordance with thethickness of sheet being handled.

It is contemplated, further, to provide impositive means for rotating 9.sheet feeding element to enable it to slip while the leading edge of thesheet is engaged with sheet locating means.

'It is also an object to provide stop means in a. cyclically operatingmachine for arresting a sheet and which automatically moves, as soon asthe lagging edge of one sheet passes, into arresting position to arrestthe next sheet to prevent advance of the latter until the next cycle ofmachine operations.

' Another object is, also, to provide feed rolls for the sheet normallyout of coaction and placed in coaction automatically duringpredetermined periods of a cycle.

sheet with respect to the.

Another purpose of the invention is to provide novel means to feed asheet automatically from a supply stack to a predetermined head-spacedposition around the platen of a writing machine.

It is further proposed to provide cyclic means for causing two spacedperiods of rotation of the platen during one cycle; the first period toeject the sheet previously operated on. by thawrlting machine, and thesecond to bring a new sheet to writing position on the platen.

It is a still further object of the invention to provide feeding meansfor coacting with the platen above the printing line and to remove thisfeeding means automatically during the interval in which a sheet isbeing brought to writing pe sition around the platen, in order to enablethe leading edge of this sheet to pass freely into position between thefeed means and the platen.

It is further proposed that a sheet guide be associated with the feedmeans above-the printing line and which is to be moved, along with thefeed means, to remot position from a coacting guide in order tofacilitate entrance of the leading edge of a sheet between the coactingguides.

Other objects of the invention will be pointed out in the followingdescription and claims and illustrated in the accompanying drawings,which disclose, by way of example, th principle of the invention. andthe best mode Which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a front view of the machine with the casing of the feeding andejecting .unit removed.

Figs. 2 and 3 are sections, respectively, on lines 22 and 3-3 of Fig. 1.

Fig. 4 is a section along lines 44 of Fig. 1; with surface parts brokenaway to show interior mechanism more clearly.

Fig. 5 is a detail view of the platen clutch engaging and disengagingmeans. i

Fig. 6 is a detail view of the automatic means for operating the releaseFig. 7 is a front, detail view of the sheet squaring and arresting meansprovided within the typewriter unit.

Fig. 8 is a side, detail view of the means for eifecting movement'of theplaten ball.

Fig. 9 is a side, detail view of the means for operating the sheetsquaring and arresting means located within the feeding section of thefeeding and ejecting unit. 1

Fig. 10 is a section along lines Ill-ll of Fig. 9.

Fig. 11 is a side view of the means for bringing the eject rolls of thefeeding and ejecting unit into play.

shaft of the typewriter.

.the magnet is energized, in a Fig. 12 is a side, sectional view of theseparator rolls and the adiacent, front portion of the envelope supplyhopper.

Fig. 13 is a side view of the means for rotating the separator rolls andthe means for bringing the feed rolls into play.

Fig. 14 is a section along lines Mld of Fig. 1.

Fig. 15 is a circuit diagram.

Fig. 16 is a time chart.

The machine comprises bars it supporting the base plate ii (Figs. 1 and2) of the feeding section. The bars i3 extend forwardly beyond the baseplate to support a typewriter unit if to which the work is fed by thefeeding section. Mounted on plate H are the main side frames 12 Camshaft 32 is provided with a sprocket 30 which, through a chain 3!,drives sprockets 42 and 53 of shafts M and 45 located below the supplyhopper. As indicated in Fig. 3, the chain and I3, to each of which isfastened a vertical extension plate I4. Secured to and straddling theside frames in front of extension plates it are spaced guide plates l5and it of a lower guiding assembly (also see Figs. 3, 12, and 13). Abovethe lower guiding assembly, an upper guiding assembly comprising guideplates Ill and It (also see Fig. 11) is secured to and straddles theside frames. The guide plates extend past the side frame 82 in order tosupport the work while being moved laterally by the typewriter carriage.

The machine may be used to feed either envelopes, sheets, or othersimilar work, to the typewriter, a supply hopper l9 (Figs. 3 and 4)being used for the sheets and a supply hopper 20 (Fig. 12) for theenvelopes. The term sheet may be used hereinafter to refer either tosheets. envelopes, or the like. To the bottom of each hopper are securedangle pieces 22, the vertical legs of which are bifurcated to seat onstuds 23 projecting from frame extension it. Either hopper, when inoperative position, has its angle pieces 22 seated on studs 23 and itsfront end resting freely on the adjacent end of the lower guide plate i5of the lower guiding assembly.

The drive for the feeding means comprises a motor M (Figs. 2, 3, and 4)mounted on a stand '25 supported by the base plate It. On the stand is agear reduction unit (not shown) enclosed in a box 26. and through whichthe motor rotates a gear 21 (see Figs. 1, 3, and 4) which, through agear 28, rotates a shaft 29 journaled between side frame l2 and avertical standard 29'. One end of shaft 29 rigidly carries a toothedclutch disk 30 (particularly refer to Fig. 3), adjacent which is aclutch arm 3| fixed to a cam shaft 32 alined with shaft 29 and journaledbetween side frame I3 and an outer standard 33. Arm 3! carries a clutchdog 34 adapted to engage the clutch disk 30. The clutch dog is helddisengaged from the clutch disk by the nose of a latch arm 35. The noseof arm 35 is simultaneously engaged with the free end of clutch arm 3|so as to hold cam shaft 32 in home position. Pivoted to the latch arm 35is a rebound pawl 35' engaged with the tail of .the clutch dog, and alsowith the free end of arm 3| so as to prevent rebound of the clutch dogand the cam shaft. Latch arm 35 is rigid with armature 36 of a clutchmagnet 31. When manner which will be explained later, the nose of latcharm 35 is withdrawn from the clutch dog 34 and the clutch arm 3|,permitting the clutch dog to engage clutch disk 33 to couple the camshaft 32 to shaft 29. When magnet 31 is deenergized, latch arm 35returns to position for intercepting the clutch dog to uncouple'the camshaft 32 from the drive shaft 29 and for intercepting the free end ofthe clutch arm 3| to arrest the cam shaft in home position.

4| passes around a guide sprocket 45 which runs free on a shaft 41.

Shafts M and 55 carry feed rollers 38, each formed with a rubber-rim, aportion of which is enlarged to provide a feed sector or cam 38'. Duringrotation of the shafts M and 45, the feed sectors 58' move throughsuitable openings in the bottom of the supply hopper to engage thebottom sheet to frictionally advance the sheet through the mouth of thehopper and towards a pair of separatorrolls 49 and 50. The frictionbetween the bottom sheet and the sheets above is sufficient to causeseveral of the sheets to feed through the mouth of the hopper, but thespacing of the separator rolls and their action, which will be explainedfurther on, are such as to permit only the bottom one of the sheets orenvelopes to pass between the separator rolls and into the lower guidingassembly i5 and E6.

The lower separator roll 55 is considerably larger than the upperseparator roll 49, and while both are provided with rubber surfaces, thesurface of the lower roll is rougher. Due to the larger diameter androugher surface of the lower separator roll, the latteracts morepositively than the upper separator roll on the sheets fed thereto. Thelower separator roll is carried by a sleeve 5i (Fig. 4) rotatablymounted on the shaft M and provided at opposite sides with frictionclutch disks 5|, one of which is engaged with a friction clutch face 52'of a collar 52 fixed to the shaft. The other disk 5| is engaged with afriction disk 53, the hub of which is slidably keyed to shaft 31. A coilspring 54 between a collar 55, fixed to shaft M, and the hub of disk 53urges the latter axially against the adjacent friction disk 5 i Thelower separator roll 50 is thus frictionally driven by shaft 41, thefriction being light enough to permit the lower separator roll to slipwhen the sheet engaged therewith is arrested.

Shaft 41 of the lower separator roll is provided outside the side framel3 with a pinion 55 (Fig. 13) rigid with a pinion 55 of the same size(see Fig. 4) which is driven, through a gear 55, from a gear 51 securedto cam shaft 32. Pinion 55 meshes with a gear 58 on a stub shaft 59carried by a side plate l3. A similar stub shaft 59 is carried by theother side frame i2. Gear 58 meshes with a pinion 60 on the shaft SI ofupper separator roll 49. -It is evident that the gearing between theseparator rolls effects their rotation in the same, clockwise direction(Fig. 13). Shaft 6| of the upper separator roll passes with considerableclearance through holes 5 I (see Fig. 12) in the main side frames l2 andI3, and is journaled on arms 62 rockably mounted on the stub shafts 59.The side frames l2 and I3 are provided with stop lugs 63 for engagementwith screws 34 adjustably carried by-the free ends of arms 62.

' Springs 35 connected to the arms urge the arms downwardly to maintainscrews 34 engaged with stop lugs 33.

When the hopper IQ for the sheets is in posi tion, the upper separatorroll shaft BI is in lower position (Fig. 13) with screws 64 engaged withstop lugs 63 and with the upper separator roll 49 spaced from the lowerseparator roll a distance substantially equal to the thickness of oneletter sheet. When it is desired to feed envelopes to the typewriter,tray I9 is removed and the envelope tray 20 (Fig. 12) inserted inposition. The envelope tray is provided with hooks 88 which, as theenvelope tray is set in position, are slipped under the shaft 6| of theupper separator roll, thereby lifting the latter against resistance ofsprings 65 so as to provide a greater spacing between the separatorrolls corresponding to the greater thickness of the envelope. As theupper separator roll is raised; the arms 82 rock counterclockwise (Fig.12) about the stub shafts 59, so that the pinion 68 of the upperseparator roll shaft 6| rolls on they gear 58 to remain'properly.

meshed therewith.

During a revolution of cam shaft 9|, feed portions 48' of rolls 48advance several sheets through the mouth of the hopper and to theseparator rolls. The lower separator roll 58 rotates in a direction tocontinue the feed of the sheets, while the upper separator roll 49rotates in a direction to return the sheets towards the hopper. Thelower roller, being rougher and larger than the upper separator" roll,its feeding action is more positive and results in the bottom sheet orenvelope being advanced between and past the separator rolls, while theother sheets are held back by the action thereon of the upper separatorroll. The bottom sheet is advanced by the lower separator roll until itsleading edge strikes a stop plate 81 (Figs. 3, 4, 9, and 10) which, atthis point of the cycle, extends completely across the space between theupper and lower guide plates I9 and I6 of the lower guiding assembly.Since the lower separator roll is frictionally driven, it is permittedto slip when retarded by frictional engagement with thenow-arrested'bottom sheet. The purpose of stops 61 is to locate andaline the leading edge of the sheet accurately for its subsequent feedto the typewriter.

Stop plate 81 projects through lateral extensions 68' of openings 88 inthe upper and lower guide plates I and I 8 of the lower windingassembly. The stop plate is pivotally carried by arms 69 fixed to ashaft I8. To the bottom of the lower guide plate I8 is fixed a lug IIwhich adjustably carries a stop screw I2 and against which the stopplate 61 is held by a spring I3. In order to prevent curling of theleading edge of the sheet when it strikes the stop plate, the upperguide plate is bent downwardly along openings88' to form lips I5 (Fig.9) which narrow the guide pas-- sage in front of the stop plate. Thescrew I2 is adjusted to position the stop plate closely adjacent thefront edges of the lips I5. The shaft" is rigidly provided with a crankarm- I5 forked to receive a stud I6 carried by an intermediate portionof an arm 11, rotatably carried by'a rod 18 fixed between side frames l8and 33. The free end of arm 11 is formed as a cam edge 11' which engagesa pin I9 on an arm 88 secured to cam shaft 32. During the cycle of shaft32, the arm 88 moves clockwise and its pin 19 cams against the edge 11',causing arm I1 to rock clockwise (Fig. 9). The clockwise movement of armI-I rocks the arm 15 and its shaft 18 counterclockwise. The arms 69 ofshaft 18 thereupon move downwardly to lower stop plate 81 out of thepassagebetween the guide plates I5 and I6. When when the rear feed rollshave finally engaged, the

the stud 19'of a'rm 88 passes the edge 11' of arm 11, a light spring 8|connected to an arm 82 fixed to the right hand endof shaft 18 (see Fig.4) returns the stop plate mechanism to its normal condition, with thestop plate 61 in upper posilower separator roll 58 and by threesuccessive pairs of upper and lower feed rolls 83 and 84 (Figs. 3, 4,12, and 13). The lower feed rolls 84 are carried by shafts 88 whichrotate continuously during the cycle, while the upper feed rolls 83 arerotatably carried by the yokes 81 secured to shaft 88. Each shaft 88, atthe end adjacent side frame I2, has an arm 89 connected to a spring 98which urges the shaft in a direction to lower the upper feed rolls intofeeding engagement with the lower feed rolls.

Initially, however, the upper feed rolls are maintained in upperineffective positions spaced apart from the lower feed rolls, with therear or left hand set of feed rolls spaced about twice as far apart asthe front two sets of feed rolls. Outside the frame I3, the rear shaft88 has an arm 92 connected by a link 93 to the upper, vertical arm of atriple-arm lever 94 which is rotatably mounted on the second shaft 88.The lower, vertical arm of lever 94 abuts a stud 95 at the upper end ofa lever 96 rotatably carried by rod 18 and provided at its lower endwith a cam follower roller 91 engaged with a cam 98 on shaft 32. Theupper arm of lever 94 abuts a pin 99 projecting from an arm I88 fixed tothe second shaft 88. The horizontally extending arm of lever 94 engagesa stud I82 on an arm I83 fixed to the third or front shaft 88.

At the beginning of a cycle, all of the upper feed rolls are in upper,inactive position. After the stop plate is withdrawn from the feed pas-'sage, the cam 98 permits clockwise movement of lever 96 (Fig. 13). Thesprings 98 of the upper feed roll structures then becomes effective torock the shafts 88 in directions to lower the feed rolls 83 intooperating positions with respect to the companion feed rolls 84. Therear feed rolls 83, being initially spaced further from the companionfeed rolls than the upper feed rolls of the front sets are from theircompanion rolls, it takes longer for the feed rolls 83 of the rear setto enage than for the feed rolls 83 of the front sets. Thus. the frontfeed rolls engage at about of the cycle at point a (Fig. 13), while therear feed rolls engage at about 122 at point D (see also Fig. 16). Afterthe front pairs of feed rolls become engaged, the rear feed rollstructure continues to move to bring the rear feed rolls into engagementand, during this continued movement. link 83 acts on lever 94 to rockthe lever further counterclockwise. with the result that upper verticalarm of lever 94 will be at a clearance distance from the pin 99 of armI88 of the second shaft 88, and the horizontal arm I 8| of lever 94 willbe at a clearance distance from the stud I82 of arm I83 of the firstshaft 88. The follower 91 of lever 98 then dwells until about at whichpoint a rise begins-and causes counterclockwise rocking of .lever 96which, acting through the lever 94 and link 93, effects disengagement ofthe rear feed rolls. This disengagement is completed at about at point 0(see Fig. 13). The two front sets of feed rolls, however, remain engagedbecause, during the rise of follower 91 to point e. the lever 94 isrocked only enough to disengage the rear feed rolls and take up theclearance bteween the pins 99 and I82 and the associated arms of lever94. The follower 91 then dwells and the two front sets of feed rollsremain engaged until about 233, atwhich point a further rise beginswhich causes rocking of lever 98 counterclockwise to a further extentand corresponding clockwise rocking of lever 04. This results in thedisengagement of the two front sets of feed rolls at about 248 at point(2 (Fig. 13).

The lower feed rolls 84 are continuously rotated during the cycle bymeans to be described later, and when the upper feed rolls are moveddown, the coaction of the feed rolls effects feed of the sheet toadvance it from the stop plate 01, which has meanwhile been lowered topermit the leading end of the sheet to pass. The feed rolls .continue tofeed the sheet along the passage 'between the upper and lower guideplates I5 and I0, out of the front, exit end of the latter passage, andinto the passage between upper and lower guide plates I05 and I (Figs. 3and 81' of a lower guide assembly provided on the typewriter carriage.

The front sets of feed rolls 0304 continue to feed the sheet along guidemeans I"I00 and into position between the lower pressure rolls I01 andthe platen I00 of the typewriter and until the leading edge of the sheetstrikes a pair of alined stops IIO (Figs. 3, 6, and 7). These stops arepivotally mounted on studs III carried by a bracket plate II2 secured tothe base plate II3 of the typewriter carriage frame H4. Also pivotallymounted on the studs III are two triple arm levers II5, one associatedwith each stop IIO. A coil spring IIG connecting the vertical arms oflevers I I5 urges the levers to rock in opposite directions to maintainthe pins III of the adjacent horizontal arms of these levers against thebottom of the head H8 of a T-shaped member IIB. Between pins IIO on theopposite horizontal arms of levers I I5 and the associated stops IIO arewire springs I20 which compel the stops to rock about studs III in thesame directions as and to follow the associated levers. The leg of the Tmember H8 is secured to an arm I22 fixed to the ordinary release shaftI23 journaled in the side plates of the carriage frame H4, and which maybe manually operated by the usual manual release lever I24 connected bya pin I25 to an outside arm I 25 fast to the left end of the releaseshaft. Arm I22 has a depression I22 which cradles the rod I20 supportingthe curved guide shield I2I which carries the rear pressure rolls I01!and the front pressure rolls I20 adapted to coact with platen I08. Whenthese pressure rolls and guide shield I27 are in upper; operativecoaction with respect to the platen, the T member I I8 is alsoin upperposition, thereby allowing spring I I6 to effectively rock the levers H5in directions to lower the pins H9 which, through springs I20, lowerboth stops IIO out of the Path of the sheet.

When release shaft I23 is rocked counterclockwise (Figs. 3 and 6), therod I26 and the guide shield I21 together with pressure rolls I01 andI28 move downwardly, away from the platen I08, to permit the sheet tomove freely into position between the platen and the guide shield withits pressure rolls. As the arm I22 is rocked downwardly, the T memberII8 secured thereto acts on the studs I ll of levers M5 to rock theselevers in directions to move the pins II9 upwardly. As a result, thewire springs I20 become effective to rock the stop arms IIIl'upwardly,through suitable openings in shield I28, into the path of the sheetbeing fed thereto by the front sets of feed rolls 33 and 04.

The automatic operation of release shaft I23 is controlled by a cam I29(see Figs. 4 and 6) coacting with a follower lever I30, connected by alink I3I to an arm I32 fixed to a shaft I33 which is journaled byintermediate frame plates I34 and I35. Also fixed to shaft I33 is asector plate I flat against another sector plate I3l (Fig. 4) rotatableon the shaft. The sector plates I36 and I3? are clamped together bythreaded fastenings I38 which pass with clearance through holes insector plate I31 and fit closely within holes of sector plate I30. Byloosening the fastenings I38, the sector plate I37 may be adjusted, withrespect to plate I33,-about shaft I33, and tightening of the fasteningsretains the sector plate I37 in adjusted position. Sector plate I3? hasan extension arm I31 engaged with the pin I 25' carried by the free endof arm I25 of release shaft I23.

During the cycle of shaft 32, cam I29 rocks follower lever I30counterclockwise (Fig. 0) which, through link I3I and arm I32, causesclockwise action of shaft I33 and, consequently, of sector plates I36and I31. Extension arm I3l' thereupon acts on stud I25 of arm I25 torock the release shaft I23 and its arm I 22 counterclockwise. As arm I22 moves inthis direction, it lowers the 1' member IIO to rock thelevers H5 in directions to permit springs I20 to raise the stops IIOinto sheet stopping position. At

. remain in operative position for a brief interval at the end of whichthe cam I29 permits the operating mechanism of release shaft I23 toreturn to normal position, causing the stops IIO to be lowered out ofthe path of the sheet and simultaneously causing the shield I21 andpressure rolls I01 and I28 to move upwardly into operative coaction withthe platen I08. The adjustment of sector plate I3'I about shaft I33adjusts the timing of the operation of stops I I0, the pressure rollsI01 and I20, and guide shield I21.

After the stops IIO are lowered, the platen I08 is automaticallyrotated, by means described hereinafter, and by coaction with pressurerolls I0? and I20 continues the feed of the sheet around the platen.

The platen feeds the work to guide means comprising upper and lowerbails, respectively including upper and lower guide plates I40 and Mt(see Figs. 3, 4, and 8). The lower bail comprises side plates I42bridged and connected by the lower guide plate I48. A spacer rod I43(Fig. 3) connects the rear portions of the side plates I42. These sideplates are-rotatably carried by a shaft I44 journaled in the sides ofthe carriage frame II4. Dependent portions I42'of the side plates areformed with openings to coact with the heads I45 of spring clips I45carried by the sides of the carriage frame, so as to hold the lower bailnormally stationary, The side plates I42 are also formedwith forwardlyextending arms I 42a provided with elongated slots I421).

The upper bail comprises side plates I40 bridged at the front by theupper guide plate 40. Secured to the side plates I46 is a front crossrod I4'I carrying upper pressure rolls I48 for coacting with the platen.The ends of rod I" extend through the slots. l42b of the extensions I42aof side plates I42 of the lower bail. Rearward extensions I46a of sidesI40 of the upper bail are formed with elongated slots I461: throughwhich the ends of shaft I44 freely pass. By coaction of the ends of rodI41 with slots clamped together.

2b of side plates I42 and by coaction of the slots I46b of side platesI46 with the shaft I44, the upper ball is mounted for slidable movementin a slightly inclined direction.

When spring clips I45 are retracted from dependent portions I42 of thelower guide ball, the entire guide assembly, which includes the upperand lower guide balls, is free to be swung rearwardly about shaft I44 inorder to permit the platen I08 to be removed or inserted.

The'slidable mounting of the upper bail enables the pressure rolls I48to be moved forwardly, and clear of the platen I08, and the upper guideplate I40 to be moved further away from the lower guide plate MI. Thepositioning of pressure rolls I48 forwardly and clear of the platen andthe increased separation of the guide plates I40 and MI insure that thework, as it is fed by the rotation of the platen, will move freelybehind the pressure rolls I48 and then between the guide plates I40 andI. The means to actuate the upper bail comprises a bell crank lever I50(see Fig, 8) fixed to the left end (as viewed in Fig. 4) of the shaftI44. The vertical arm of lever I50 is forked to engage with a stud IIextending laterally from the rear, dependent extension I460 of the leftside plate I46. A similar arm (not shown) is provided at the oppositeend of shaft I44 to engage with a stud such as I5I on the right sideplate I46, Th 'horizontal arm of bell crank lever I50 is provided with apin I52 engaged with an arm I53 of a rocker plate I53 rotatable on ashaft I54 journaled by intermediate frame plates I34 and I35 (see Fig.4) and which is alined with shaft I44. Shaft I50 rigidly carries asector I55 to which fastenings I56 adjustably clamp the rocker plate I53in the same manner as the previously described sector plates I36 and I31of the release mechanism are Rigidly carried by shaft I50 is an arm I51connected by a link I58 to a. lever I59 pivoted on a stud I60 extendingfrom the intermediate frame plate I35. Lever I59 is connected by a linkI62 to the follower lever I63 of a cam I64 on cam shaft 32. A spring I65connected to lever I59 forces the follower I63 to remain engaged withthe cam I64, During the cycle of cam shaft 32, cam I64 acts on followerI63 to cause clockwise movement ofv lever I59 and counterclockwisemovement .of shaft I54. As shaft I54 rocks counterclockwise, the arm I53acts on the stud I52 of bell crank I50 to rock the bell crank lever andits shaft I44 counterclockwise. The forked arms of shaft I44 thereuponcoact with studs I5I of side plates I46 to to hold shaft I44 at itsclockwise limit and, thereby, to maintain the upper bail in rearposition, with pressure rolls I48 engaged with the platen and the guideplate I at normal distance from guide plate MI. The adjustment of plateI53 about shaft I 54 adjusts the timing of the'operation of the upperbail. This bail may be .referred to hereinafter as the platen bail todistinguish it from the lower, normally stationary bail.

When the platen ball is moved forwardly, the platen I08 continues tofeed the work behind the pressure rolls I48 and into the passage betweenguide plates I40 and I until a predetermined head spacing of the work iseffected, whereupon the automatic rotation of the platen ceases'and thepressure rolls I48 and guide plate I40 return to normal positions. Thetypewriter is then operated to type the desired matter on the work and,during the, course of this typing, the work is line spaced in the usualmanner to continue the feed of the work upwardly along the passagebetween the guide plates I40 and I4 I. The line spacing effected duringthe typing may result in the leading end of a letter sheet being fed outof the passage between guide plates I40 and MI and into the alinedpassage between the guide-plates ll'and I8 (see Fig. 3) and to such anextent as to bring the forward end of the sheet between the lowest orfront I set of eject rolls I61 and I68, all of which, dur- I will beexplained later, during the, first portion tinued in automatic rotationnowfeeds the work behind the pressure rolls I48 and into the passagebetween the guide plates I40 and MI until the desired head spacing hasbeen effected. Thereafter, the cam .I64 permits the spring I to returnthe operating linkage for shaft I54- to normal position. The shaft I 44is forced to follow and also return to normal position by means of acoil spring I66 (Fig; 4). surrounding the shaft I 44 and connected atone end to a collar I44a fixed to the shaft and at the other endabutting the normally stationary spacer rod I34 of the lower bail (seeFig. 3). Thi spring tends of which the platen is automatically rotatedand.

coacts with pressure rolls I48 to eject the sheet I until the leadingend thereof is at least between the first set of eject rolls I61 andI68. There are three successive sets of upper and lower eject rolls I61and I68 (Figs. 1, 3, and 11). The upper eject rolls I61 are fixed toshafts I69 constantly rotated during the cycle, while the lower ejectrolls are supported by yokes I10 fixed to shafts HI and normally urgedby springs I12 into operative feeding coaction with the upper ejectrolls. Nearthe beginning of the cycle, the lower eject rolls are broughtinto coaction with the upper eject rolls to eject the work, on which thetyping had been completed, into the receiving tray I14. This receivingtray has forked angle pieces I-15 for engaging studs I16 on theextension" frame plates I4. Tray I14 is freely removably supported inposition by means of these studs I16 and by means of studs I11 extendingfrom the main side frames. The

means for bringing the lower eject rolls into operative engagement withthe upper eject rolls comprises a cam I18 (Figs. 4 and 11) coacting witha follower lever I19 connected by a link I to a plate I8I (also see Fig.l) rotatably carried by the shaft I H of the middle set of eject rolls.The plate I8I has an edge I8Ia engaged has an arm I86 connected by alink I81 to the plate I8I. When the follower lever I19 is engaged withthe high portion of cam I18, the plate i8I is in a position in which itcauses the lower eject rolls to be held out of operative coaction withthe upper eject rolls. When the follower lever drops on the high pointof cam H18, plate I8! is free to rock counterclockwise (Fig. 11).Thereupon the springs I12 become effective to rock the shafts I" indirections to move the lower eject rolls upwardly into feeding coactionwith the upper eject rolls.

The means for eflecting rotation of the lower feed rolls 84 and theupper eject rolls I61 will now be explained. Carried by the cam shaft 32is a gear I99 meshed with a gear I9I rotatably mounted on a stub shaftI92 carried by the side frame plate 33 (see Figs. 1, 2, and 4). Rigidwith the gear I9I is a sprocket wheel I93 which, through a chain I94,drives a sprocket wheel I95 on a shaft I96. journaled by frame plates 33and I34. Outside the frame plate 33, the shaft I86 rigidly carries apulley wheel I91. The shafts 86 and I69, respectively of the feed rolls84 and eject rolls I61, extend past the left hand frame plate 33.Referring to Fig. 2, the front shafts 86 and I69 (nearest thetypewriter)are provided outside frame plate 33 with pulley wheels I98. The leftends of the first two feed roll shafts 86 are provided with pinions I99meshed with opposite sides of a pinion 299 rigid with a pulley wheel 29frotatably-journaled on the frame plate 93. The left ends of the uppertwo eject shafts I69 are provided with pinions 292 meshed with pinions293 rigid with pulley wheels 298 rotatably carried by the frame plate33. Passing around pulleys I91, I98, 2M and 294 is a belt 295 whichcommunicates rotation of pulley wheel I91 to the other pulley wheels.The belt is tensioned by a wheel 296 carried by a lever 291 rockable onshaft I96 and acted on by a spring 298. Any excess slack in the beltbetween the two rear pulleys 299 and 293 is taken up by a wheel 299carried by a stud 2I9 adjustably settable along a horizontal slot 2 inframe plate 33. Rotation of pulley wheels I98 effects rotation ofsthefront shafts 86 and I69. Rotation of-pulley 29I acts through pinions 299and I99 to rotate the first two feed shafts 86. The pulleys 294, actingthrough pinions 293 and 292, rotate the upper two eject shafts I69. Inthis manner, the rotation of the cam shaft, through the chain I94,rotates shaft I96 which, through pulley I91 and belt 295, causescontinuous rotation of the lower feed rolls 84 and the upper eject rollsI61 during the entire cycle.-

The means for automatically rotating the typewriter platen I98 will nowbe described.

Referring to Fig. 14, shaft I96 carries an axially movable crown clutchdisk 2 I4 facing a similar clutch disk 2I5 on ashaft 2| 6 in alinementwith shaft I96 and journaled by intermediate frame plates I34 and I35.At the right of the frame plate I35, shaft 2| 6 rigidly carries a wheel2I1 faced with notches 2l8, adapted for engagement with .a tooth 2I9projecting from an arm 229 fixed to the left end of shaft 22| of theplaten I98, the latter shaft being in line with shaft 2I6 as well aswith shaft I 96. The

' rim of wheel 2I1 is formed with teeth 222 for coacting with animpositive detent 223 which impositively prevents rotation of shaft 2 I6. During the cycle of camshaft 32, it acts, as explained before, toeifect continuous rotation of shaft I96 and, thereby, of clutch disk2I4.

Referring to Fig. 5, cam shaft 32 has a disk 225 provided with studs 226and 221 extending transversely from one side of the disk and a stud 228extending transversely from the opposite side of the disk. Near thebeginning of the cycle, the first stud 226 cams against the lower end ofan arm 229 of a lever 239, rotatably carried by the rod 18, to rock thislever counterclockwise (as viewed in Fig. 5). The arm 23I of lever 239is bifurcated to engage with a pin 232 on one arm of a bell crank latchlever 233 ro tatably mounted on the shaft I33. The vertical arm of lever233 is formed at the upper end with a latch nose 234 engaged with atransversely bent tab 235 of a lever 236. The forward end of lever 233carries a beveled disk 231 located above the rim of clutch disk 214 onshaft I96. The rear end of lever 236 has a pin and slot connection withone end of a lever 238 which, at the other end, is formed with a camedge 238' adapted to be engaged by the pin .228 of the disk 225 on camshaft 32.

Near the beginning of the cycle, pin 226 acts on arm 229 to rock lever239 counterclockwise causing clockwise movement of latch lever 233against resistance of a spring 249 and, thereby, withdrawing the latchnose 234 from the tab 235 of lever 236. A spring 2 connected to lever239 thereupon becomes effective to rock the lever 238 counterclockwise(Fig, 5), in turn causing clockwise movement of lever 236. It may benoted that at this point the pin 228 of disk 225 is remote from cam edge238' of lever 238 so that it does not interfere with the downwardmovement of the cam edge 238. When lever 236 rocks clockwise, thebeveled edge of the disk 231 carried thereby engages with the rim ofclutch disk 214 to cam this clutch disk to the right (Fig. 14) againstresistance of a plate spring 242 (see Fig. 14) thereby engaging clutchdisk 2 with clutch disk 2I5 to couple shafts 2I6 and I96 for commonrotation.

Before initiating the cycle of cam shaft 32, the operator brings thetypewriter carriage to the extreme left or to the end-of-the-lineposition,

and leaves the carriagev in this position during the entire cycle. Atthis extreme left-hand limit of the travel of the typewriter carriage,the tooth 2I9 enters one of the face notches 2I8 of the wheel 2 rigidlycarried by the shaft 2I6, thus coupling the platen shaft 22I to theshaft 2I6 before the beginning of and for the duration of the cycle.Hence, during the periods of the cycle when shaft I96, through engagedclutch disks 2 and 2I5. rotates shaft 2I6, the latter shaft, throughcoupling 2I8-2I9, rotates the shaft 22! and platen I98. 7 The rotationof the platen I98 now acts to eject the sheet in the typewriter and thetyping of which has been completed," moving the sheet further upwardlyalong the passage between guide plates I49 and MI and into the passagebetween guide plates I8 and I9 until the-leading portion of the sheet orenvelope is located at least between the front set of eject rolls I61and I68. This eject action of the platen is terminated when the pin 223on the cam shaft disk 225 moves into coaction with the cam edge 238' oflever 238, causing lever 238 the front of latch nose 234 of latch lever233 until it reaches a position below the latching shoulder of the latchnose, whereupon spring 246 rocks the lever 233 counterclockwise torelatch lever 236.

While the platen is rotating to eject the sheet previously typed, thefeed rolls 83. 84 are advancing the next sheet along the passage betweenguide plates I and I6 and through the passage between guide plates I05and I06 until the leading edge of the latter sheet strikes the stopsIIO. As explained before, this definitely locates the sheet for itssubsequent feed by the platen to the predetermined head spaced position.The'stops III) are in arresting position for a brief interval and asthey withdraw, pressure rolls I61 and I28 and guide shield I21 return tooperative position with respect to plate I08. Shortly thereafter, theplaten shaft 22I is again set in rotation. This is effected when the pin221 of disk 225 rides past the arm 229 of lever 236, causing theengagement of clutch disks 2M and 2 I 5, in the same manner as explainedbefore, to couple shaft 2I6 to shaft I96. The platen shaft 22I, which isstill coupled to shaft 2I6, is thus set in rotation for the second timeduring the same cycle. The. second period of rotation of platen I08advances the sheet towards the pressure rolls I48, which as the leadingedge of the sheet is approaching, are moved forward together with upperguide plate I40, in the manner explained before. The leading edge of thesheet then is fed by the platen behind the pressure rolls I48 and intothe passage between the guide plates I46 and I. When the-desired,predetermined head spacing has been effected, the platen I08 stopsrotating, and the pressure rolls I48 and guide plate I40 return tonormal positions. The means for interrupting the rotation of the platenwhen the desired head spacing has been effected includes a plate 256,rotatably car-- ried by shaft 32 and adjustably provided with anelongated slot 250' through which a screw 25I, threaded into a hole inthe disk 225, freely passes, to clamp the plate 250 to the disk in aconcentrically adjustable position. Plate 250 is provided with a stud253 extending in the same direction as stud 228 towards the lever 238.After the pin 221 on disk 225 has acted on the lever 236 to unlatch' theclutch engaging lever 236, producing the second period-of rotation ofthe platen during the same cycle, the stud 253 strikes the cam edge 238'of lever 238 to cause the lever 236 to return to clutch-disengagingposition, in which it is again relatched by lever 233. adjusting theplate 256, about shaft 32, with respect to disk 225, the point of thecycle at which the stud 253 engages the cam edge 238' may be varied tovariably time the end of the second period of rotation of the platen,thereby varying the extent of the automatic head spacing.

During the cycle of cam shaft 32, it is necessary that the typewritercarriage first be moved to its left-hand limit (as viewed in Fig. 1), inwhichposition, as described before, the platen shaft MI is coupled toshaft 2I6. In Order to prevent initiation of a cycle unless this isfirst done, the cycle-initiating means includes a pin 260 (Figs. 1 and4), extending from the left side of carriage frame H4, and which, as thecarriage is moved to its left-hand limit, strikes a vertically disposedspring contact blade 26I to close contacts 262 (also see Fig. 2). Withcontacts 262 closed and the main switch 263 (Fig. 1) turned on, theoperator may then initiate a cycle by depressing the push button 264.Referring to the circuit diagram (Fig. 15) with switch 263 closed, thepin 266 of the typewriter carriage holding contacts 262 closed, and withthe push button contacts 264a. and 2641) closed, the following circuitis completed: From the side 265 of the source of current, through themotor M, line 266, push button contacts 264b, carriage operated contacts262, and through switch 263 to the opposite side 261 of the currentsource.

The motor M is set in operation by the above circuit. Simultaneouslywith the formation of the motor circuit, a circuit is establishedthrough the clutch magnet 31. The circuit of clutch magnet 31 is fromthe supply side 265}, through the magnet, push button contacts 264a,carriage operated contacts 262 and switch 263 to the opposite supplyside 261. In the manner explained before, the energization of magnet 31couples the cam shaft 32 to the motor-driven shaft 29 for a cycle ofoperation.

On the extreme left-hand end of the cam shaft 32 is a disk 216 (see Fig.2) of insulating material which has a single high point 218a, engaged atthe beginning of the cycle with a roller 21I carried by the lower end ofa lever 212 pivoted to the frame plate 33 and which is urged clockwise(Fig. 2) by a bent spring 213, extending between the lever and a bracket214. The bracket 214 mountsa stationary but adjustable contact 215adapted to coact with the companion contact 216 carried by the upper endof lever 212. At the beginning of the cycle, with the high point 216a ofdisk 216 engaging roller .21l, of lever 212, the contact 216 carried bythe lever is separated from the contact 215. Directly after the camshaft 32 starts its cycle, the high point 218a. of

disk 210 departs from the roller 21lof lever to rotate until cam disk210, just before the end' of the cycle, engages again with the roller 2"to return lever 212 counterclockwise opening the cam contacts 215-216.The operator need hold the push button 264 in only momentarily since,after the cycle starts, the motor circuit is held by the shunt paththrough cam contacts 215-216. As soon as the operator releases the pushbutton, contacts 264a and b open, causing deenergization of clutchmagnet 31 which permits latch lever 35 to return to position fordeclutching cam shaft 32 from drive shaft 29 at the end of onerevolution of the cam shaft.

As stated previously, it is only possible to initiate a cycle when thecarriage is at its extreme left-hand limit, in which position the guidemeans III5III6 and I4Il-I4I thereof are located directly in front of themain side frame I2 and I3 and, respectively, in positions to receive thenew sheet from the lower guide plates I5 and I6 and for ejecting thetyped sheet into the passage between the guide plates I1 and I8. As soonas the typing starts the carriage spaces to the right, resulting in theopening of contacts 262 so as to prevent initiation of a cycle. Duringtyping, as the carriage travels towards the right, the exit end of thepassage between guide plates I40 and HI moves along the entrance end ofthe passage tom sheet in the hopper.

between guide plates H and it, so that when the sheet is fed upwardly byvertical spacing operations of the platen, the leading end of the sheetmay enter freely between the guide plates l8 and it, if it has notalready done so during the head spacing operation. If a long sheet isbeing typed on, the lagging portion thereof may extend to the rear ofthe guide plates I and lot and into the passage between plates l5 and I8. During the travel of the carriage towards the right, the rear andfront portions of the sheet may travel freely along the portions ofguide plates it and i9 extending beyond the side frame l2.

Summary of operation A brief summary of the operations will now be givenwith particular reference to the time chart (Fig. 16).

When it is desired to feed envelopes, then the envelope tray 20 (Fig.12) is used, and when it is desired to feed flat sheets such as lettersheets,

then the tray i9 (Fig. 3) is used. It should be noted that the envelopesare stacked in the tray is assumed to have been previously fed to thevtypewriter and its typing completed, of which the second sheet isassumed to have been fed out of the hopper with its leading edge againstthe #1 stop El, and of which the third sheet is the bot- Having broughtthe typewriter carriage to the extreme left (Figs. 1 and 4) to cause pin26!) to close contacts 262, the operator momentarily depresses the pushbutton 266 to close push button contacts 254a and 26161). As a resultthe clutch magnet 37 is energized and the motor M set in operation. Camshaft 32 now .goes through a cycle. The first thing that occurs duringthe cycle is the movement of the lower eject rolls H68 (see Fig. 11)upwardly into coaction with the eject rolls ltl; this occurs at about 20of the cycle. Shortly thereafter, at 27 of the cycle, the platen clutchM l-2m (see Fig. 14) is engaged under control of the pin 22$ on the disc225 of cam shaft 32 (see Fig. 5). The platen now starts rotating andejects'the first sheet, on which the typing has been completed, entirelyfrom the platen to the eject rolls, which complete the ejection of thissheet to the storage hopper l'ld. At 120 of the cycle, the second sheet,which has its leading edge against the #1 stop, is free to advanceforwardly as a result of the lowering of this stop. At 122, the rear setof feed rolls 83-, which is the set adjacent the stop Bl, engages andstarts advancing the second sheet towards the front sets of feed rolls83 and 8d. The latter sets continue the feed of the second set until theleading edge thereof strikes the #2.,stop I ill (see Fig. 3) at 233. The#2 stop was moved upwardly into sheet arresting position at 210,simultaneously with the lowering of the pressure rolls I01 and I28 andapron 127 out of coaction with the platen. The sheet thus enters freelybetween the platen and pressure rolls until it is arrested by the #2stop. The #2 stop is out of the way of the second sheet at 240 and thepressure rolls, at the same time, are moved upaaao ee wardly intocoaction with the platen, prepared to cooperate with the platen infeeding the second sheet around the platen into head-spaced position. At240, the pin 227 (see Fig. 5) on the disc 225 of cam shaft 32 acts onthe arm 229 to cause a second platen clutch engagement during the cycle.The platen now starts its second period of rotation and, by coactionwith pressure rolls I67 and I28, feeds the second sheet to headspacedposition, this feeding action terminating at 285 as a result of theaction of the pin 253 (see Fig. 5) on the lever 238 to cause release ofthe platen clutch. The second sheet is now in headspaced position, readyto be typed on. The #1 stop returned to sheet arresting position at 139,prepared to arrest the third sheet when the latter is fed out of thehopper. At 220, the hopper feed cams 68' start to feed the third sheet,or the bottom sheet in the supply hopper, out of the hopper and to theseparator rolls 49 and 50 (see Fig. 3). The hopper feed cams, inconjunction with the separator rolls, cause the third sheet to advanceuntil it strikes the #1 stop at 257. The #1 stop is now in upper, sheetarresting position and remains therefor the rest of the cycle. Thus, thethird sheet also remains engaged with the #1 stop until of thenextcycle, at which point this stop again is moved out of sheet arrestingposition.

While there has been shown and described and pointed out the fundamentalnovel features of the invention as applied to a single modification itwill be understood that various omissions and substitutions and changesin the form and details of the device illustrated and in its operationmay be made by those skilled in the art without departing from thespirit of the invention. It is the intention, therefore, to be limitedonly as indicated by the scope of the following claims.

What is claimed is: i

1. In combination with a writing unit having printing means and alaterally movable carriage provided with a platen over which a sheet isfed to be printed on by the printing elements, cyclically operable powermeans, means controlled by the power means to insert a sheet on theplaten, and means for initiating a cycle of the power means only whenthe carriage is in an end position and including a device renderedeffective by the carriage when in the end position.

2. In combination with a writing unit having writing means and alaterally movable platen on which a sheet is disposed to be written onby the writing means, automatic power means, means operated by the powermeans to feed a sheet from a sheet supply and along a laterallyrestricted feed path to the platen'and means for initiating operation ofthe automatic power means, and means for preventing the power means frombeing initiated in operation unless the platen is in lateral alinementwith said feed path.

3. In combination with a writing unit having printing elements and alaterally movable platen over which a sheet is disposed to be printed onby the printing elements, a storage tray, ejecting means for ejecting asheet from the platen and into the storage tray along a laterallyrestricted eject path, and means for rendering the ejecting meansefiective only when the platen is in lateral alinement with the ejectpath, so as to compel the platen to be placed in said alinement beforethe ejecting means may become effective.

4. In combination with a laterally movable carriage provided with arotatable platen and prevent making of the circuit.

type elements to type on a sheet disposed around the platen, automaticmeans to feed sheets successively from a sheet supply to head-spacedposition around the platen, electrical means including a startingcircuit to cause'operation of the feeding means, and a switch in thecircuit closed under control of the carriage only while the carremainingopen, to prevent making of the starting circuit, while the carriage isin any other lateral position,

5. Recording apparatus including a, sheet support and recording elementsto record on a sheet lying on said support, in combination with sheetfeeding apparatus including automatic, cyclically operable powermechanism, paired completely round feed rolls initially spaced apart andout of feeding coaction, means operated by the power mechanism forcontinually rotating at least one of said feed rolls during the cycle,means controlled by the power mechanism for bringing said paired feedrolls together, while at least one of them is in rotation, into feedingcoaction durriage is in a predetermined lateral position and ing apredetermined period of the cycle, rotation of. the paired feed rollsduring their period of coaction advancing a sheet towards the sheetsupport, and means operated by the power mechanism for causing the sheetadvanced by the feed rolls to be fed to writing position'on the sheetsupport.

6. Recording apparatus including a laterally shiftable carriage Providedwith a rotary platen and its shaft, in combination with automatic, powermechanism, means for coupling the mechanism to the platen shaft foreffecting rotation of the platen comprising a tooth-engaging element anda coacting tooth element, one of said elements being connected to theplaten shaft. for engaging the other element when the carriage "is in apredetermined lateral position thereby to couple the platen to the powermechanism for rotation by the mechanism, and means,

including a device controlled .by the carriage yoperable automatic,power mechanism, means "operated by the power mechanism for feeding asheet during the cycle to insert the leading end of the sheet betweenthe platen and pressure roll, and means operated by said power mechanismduring the cycle for causing the relative separating movement betweenthe platen and pressure roll to separate them while the feed means isfeeding a sheet therebetween and for causing the platen and pressureroll to return to normal feeding coaction after the sheet has beeninserted therebetween.

9. A recording apparatus comprising a rotary platen, a pressure rollabove the recording line and having a normal position of coaction withthe platen to feed a sheet during rotation of the platen, and means formounting the pressure roll for movement forwardly of the platen toprovide a clear space therebetween for a sheet to be inserted and toserve to guide the sheet towards the platen, in combination withautomatic mechanism for feeding a sheet from a supply stack to theplaten and inserting the sheet between the platen and pressure roll, andmeans for automatically moving the pressure roll forwardly of and awayfrom the platen just before the leading edge of the sheet reaches thepressure roll for a cycle, a member operatively connected to I,

the platen, and a circuit for energizing the magnet and including aswitch temporarily closed by said member only while the platen occupiedwith the platen in any other position so as to 8. In a recordingapparatus, a rotary platen,

and for returning the pressure roll to normal position after the sheethas moved into position between the pressure roll and platen.

10. A recording apparatus comprising a rota platen and a pressure rollcoacting with the platen to feed a sheet andlocated above the recordingline and in which the pressure roll is mounted for movement to aposition in front of and away from the platen, in combination with -acyclically operable power mechanism, means operated by the powermechanism to insert a sheet between the platen and pressure roll, andmeans operated by the power mechanism in timed relation to the sheetinserting means for automatically moving the pressure roll temporarilyaway from and in front of the platen to enable the leading edge of thesheet to be inserted freely between the platen and pressure roll.

11. A recording apparatus comprising a rotary platen. a pair of guidesabove the recording line coacting to guide a sheet fed upwardly from theplaten, in combination with automatic means" below the guides to feedthe sheet upwardly from the platen and tow rds the guides, cyclicallyoperable mechanism for operating the feed means to feedthe sheet duringa cycle towards and into position between the guides, and means 'feedmeans for automatically and temporarily -.spacing said guides furtherapart to insure the a pressure roll above the recording line and havinga normal position of coaction with the platen to feed a sheet duringrotation of the platen, means for mounting the pressure roll and platenfor relative separating movement to provide a spacing relation.

ALBERT. W. MILLS. FRANK J. FURMAN. SIGI; !RD Ll WALSOE.

